EBP, Employer Contribution, Minimum Catch-Up Contributions Age

No definition available.

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- Definition

Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

EBP, In-Service Distribution Age

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Involuntary Cash-out Limit

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

EBP, Non-Elective Employer Contribution, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Default Period

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term

+ References

No definition available.

+ Details

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Namespace Prefix:	tep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Repayment Period

+ References

No definition available.

+ Details

Name:	tep_EBPNoteReceivableFromParticipantRepaymentPeriod
Namespace Prefix:	tep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Maximum Contribution To Investment, Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	tep_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	tep_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participate Contribution, Maximum Balance Of Investment, Percent

+ References

No definition available.

+ Details

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Namespace Prefix:	tep_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Severance Of Employment Age

+ References

No definition available.

+ Details

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Namespace Prefix:	tep_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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- Details

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- Details

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- Details

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DESCRIPTION OF PLAN (Details) - EBP 007	5 Months Ended	7 Months Ended	12 Months Ended
DESCRIPTION OF PLAN (Details) - EBP 007	May 31, 2025	Dec. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) year	Dec. 31, 2024
EBP, Description of Plan [Line Items]
Pretax, maximum annual compensation to total compensation, percentage		75.00%
Catch-up contribution age \| year			50
Automatic deferral rate			3.00%
Matching percentage			100.00%
Non-elective employer contribution, percentage			6.00%
Employer contribution vesting percentage			100.00%
Minimum borrowing, amount \| $		$ 1,000	$ 1,000
Maximum borrowing, amount \| $		$ 50,000	$ 50,000
Maximum borrowing, to total account, percentage		50.00%	50.00%
General loan, borrowing term			5 years
Primary residence, borrowing term			15 years
Repayment period			14 days
Default period			3 months
Basis spread on variable rate			2.00%
Involuntary cash-out limit \| $			$ 1,000
Fortis Inc. Common Stock
EBP, Description of Plan [Line Items]
Maximum contribution to investment, percentage			20.00%
Maximum percent of contribution of account balance			20.00%
Maximum
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage			4.50%
Minimum
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage			4.50%
Severance of employment age \| year			55
In-service distribution age \| year			59
EBP, Tucson Electric Power Company
EBP, Description of Plan [Line Items]
Pretax, maximum annual compensation to total compensation, percentage	25.00%
Matching percentage				100.00%
Participant compensation matched, percentage				4.50%
EBP, UNS Gas, Inc. and UNS Electric, Inc.
EBP, Description of Plan [Line Items]
Pretax, maximum annual compensation to total compensation, percentage	50.00%
Matching percentage				50.00%
Participant compensation matched, percentage				6.00%